Glass-press.



No. 726,088. n PATENTED APR. 21, 1903.v

S. MGGAUGHTRY. Y

GLASS PRESS.

APPLICATION FILED APB.. 9, 1902.

NO MODEL. 2 SHEETS-SHEET l.

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* ./ZZ'ZLvzQ/m@ VNo. 726,088.

PATENTED APR. 21, 1903.

S'. MGCAUGHTR-Y.

GLASS PRESS.

APPLIGATIQN 1111.31) APR. 9, 1902.

2 SHEETS-SHEET 2.

NO MODEL.

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UNITED STATES;

@PATENT OFFICE;

SAMUEL MCCAUGIITRY, or WASHINGTON, PENNSYLVANIA.l

i GLASS- .PRESS- SPECIFICATION forming part Of Letters atent N0. 726,088, dated April 21, 1903. Application filed April 9, 1902.` e'rialNo-i 102,031. (No model.) I

This invention relates v to certain new andv useful improvements in glass-presses, and relates more particularly to ordinary singleplunger presses, in which the table and plun ger are capable of being shifted in successionv to the position for thelwoigk so'intended for such mechanism.

The invention has for its object to provide a construction of plunger-actuating mechanism whereby the plunger is actuated vfor effecting the initial shaping operation; furthermore, to provide novel means whereby,

the pressure of the plunger is gradually in-y creased as it is lowered.

My invention still further aims to provider means whereby the plunger when it hasreached the limit of its downward stroke will be retained for a certain predetermined interval during the nal shapingof the glass. A still further object of my invention is to provide a novel form of yielding connections to the mechanism that willeectually prevent the crushing or straining of the-article manufactured. Y s

My invention also contemplatesto provide a novel formof mechanism of the above-de`-,

scribed character that will be extremely simple in construction, stron g, durable, and comparately inexpensive to manufacture.

With the above and other objects in view the invention consists in the novel construction, combination, and'arrangement ofparts to be hereinafter more fully described, and speciiically-pointed out'in the claims.`

In describing theinyention in detail reference is had to the; accompanying drawings, forming a part ofthis specification', and wherein like numerals of reference indicate like parts throughout the several views,in Which- Figure l'isVV a 'front' vieW- of my improved glass-press. Fig. 2 is a side elevation thereof. Fig. 3 is a detail view of a modified form of -yielding connections.

Fig. 4 is a side elevation showing Athe Aend of one 4of the arms.

p In the drawings the reference-numeral 1 represents the truck, carrying a table 2, upon which is secured the mold3.v In-.the truck 1 is mounted a driven shaft 4, Acarrying a pinion 5,. meshing with the"cog-,wheel 6, which is mounted upon the main shaft 7, extending through the front portion of the truck. This shaft has secured at its ends cams 8, operating Iagainst antifriction-rollers 9, whichiare rotatably secured upon .the slotted ends 10 of the arms 11, the upper ends of said arms befing pivotally connected at 12 to the crossh'ead 14, having guideways 15 formed therein, which operate and are slidably connected to the standards 16, which are rigidly secured to' the table 2. A cross-head 17 is also slidably `mounted upon the standard 16 in like manner. These cross-heads 14 and 17 are provided with central bearings 18 and 19 for the reception of 'the rod 20, which carries on its lower end the plunger 21, the latter conform- `ing with the interior of the lmold 3. The rod ,20 is screw-threaded near its upper end and carries an adjustable collar 22, and a collar 23 is secured upon the rod 2O below the crosshead 14. v Upon the upper face of this collar 23 and encircling the rod 20 is secured a spiral spring 24, said spring being 'surrounded vpartiallyfby theheavier coiled spring 25, the latter also resting Iupon the upper face of the vdollar l23. y In lieu of v-thesprings 24 and 25 ,one or more springs maybe arranged as shown `-in:Fig.'-3wof the drawings, two springs operating onthe ends and two heavier springs in '-the'center, these springs shown inl modified form encircling rods which pass through the cross-head 14. The peculiar arrangement of the springs 24 and 25, or the springs shown in the modified form of Fig. 3 of 4-the drawings, performs a very important functionnamely, it gradually increases the pressureof of the plunger upon the article bein'gformed;

The operation of my'improved press lis as follows: The glass is placed inthe mold and by the rotation of the shaft 7,"towhichmlovementlis'communicated through the mediumV of the Vpinion 5 of the driven shaft 4, the cams S are operated, and we will assume for the purpose of illustration that the parts are in the position as shown in Figs. 1 and 2 of the drawings, showing the plunger elevated. As the cams 8 are rotated the lower antifrictionrollers are engaged by the peripheries of the cams 8, thereby drawing downwardly the slotted end l0 of the arm 1l, the slotted portion of the arm riding in the shaft 7. By this operation the cross-heads will also be operated downwardly and the gradual pressure of the plunger will be brought to bear upon the glass, which will be increased as the spring 25 is brought under tension or the heavier and shorter springs shown in Fig. 3 of the drawings. Upon reaching the limit of its downward movement the plunger will be raised by the action of the eccentric portions ot the cams on the rollers 9.

The many advantages obtained by the use of my improved device will be readily apparent from the foregoing description, taken in connection with the accompanying drawings.

It will be noted that various changes may be made in the details of construction without departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a glass-press, the combination with the table, the standards, and the driven shaft, of a cross-head slidably mounted on the said standards, cams secured on the opposite ends of the said shaft, arms pivotal ly connected to the said cross-head, and having their lower ends formed with elongated Islots, through which the ends of the said shaft extend rollers secured to the said arms on opposite sides of each or" the said cams, a rod mounted in the said cross-head, a collar secured to the said rod, and springs of varying strength secured to the said collar, one of which is engaged by the cross-head as the same is moved downwardly.

2. In a glass-press, the combination with the supporting-standards, ofacross-head slidably mounted on the said standards, a rod mounted in the said cross-head, a collar secured to the said rod beneath the said crossliead, and springssecnred to the said collar, one of which has its upper end normally in engagement with the said cross-head, and another being engaged by the cross-head on its downward movement.

3. In a glass-press, the combination with the table and supporting-standards, of a crosshead slidably mounted on said standards, a rod mounted in said cross-head, a plunger, a collar secured to the said rod below the crosshead, springs of varying strength secured to the said collar, certain of which have their upper ends normally in engagement with the said cross-head, the others being engaged as the cross-head is lowered, and means to impart an intermittent reciprocating movement to the said rod, substantially as described.

4. In a glass-press, the combination with the table and supporting-standards, of a crosshead slidably mounted on said standards, a plunger-rod loosely mounted in said crosshead and having its upper end screw-threaded, an adjustable collar secured on the said screw-threaded end, a collar secured to the said plunger-rod at a point below the said cross-head, springs of varying strength encircling the said plunger-rod and secured to the last-named collar, and adapted to be engaged by the said cross-head, and means to impart a reciprocating movement to said plunger.

In testimony whereof I aiiix my signature in the presence of two witnesses.

SAMUEL MCCAUGIITRY.

Witnesses:

A. J. ZAHNISER, F. A. VEZIE. 

